See kubernetes-announce@ and CHANGELOG-1.12.md for details.
SHA256 for kubernetes.tar.gz: 184ea437bc72d0e6a4c96b964de53181273e919a1d4785515da3406c7e982bf5
Additional binary downloads are linked in the CHANGELOG-1.12.md.
https://github.com/kubernetes/kubernetes/releases/tag/v1.12.0-rc.2